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04-18-2007, 05:04 AM
| #1 |
| Newbie Join Date: Apr 2007 Location: ocala
Posts: 8
|  batteries
I have been racing stock off-road for awhile and I know that it is all about batteries. Are batteries as important for crawling?
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04-18-2007, 10:29 AM
| #2 | |
| Quarry Creeper Join Date: Feb 2006 Location: Shillington
Posts: 462
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04-19-2007, 02:39 PM
| #3 | |
| Quarry Creeper Join Date: Jul 2006 Location: Northglenn
Posts: 310
| Quote:
My understanding is if you move over to Brushless then batteries do matter. I have read other threads where others have issues until they move over to a custom battery back. Cheapbatterypacks.com is a great place to go, if you are looking for batteries. | |
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04-19-2007, 02:53 PM
| #4 |
| owner, Holmes Hobbies LLC   Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Batteries are indeed important if you want to get the most out of your motor. Battery bars, good connectors, and good wire is a must for any high performance vehicle. If you go to brushless it is all the more important.
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04-19-2007, 02:59 PM
| #5 |
| Pebble Pounder Join Date: Jul 2006 Location: SL,UT
Posts: 166
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these are all i run. get almost an hour out of it. you think it would be good if i go brushless? http://cgi.ebay.com/ws/eBayISAPI.dll...m=170079386791 |
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04-19-2007, 03:03 PM
| #6 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Those would not work for any brushless system in a crawler unfortunatly. Only 12 amps continuous... Even a tiny 2215 motor will burst 50 amps.
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04-19-2007, 04:18 PM
| #7 | |
| Hell's Gnome Join Date: Jun 2006 Location: I'm mean because you're stupid.
Posts: 334
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04-19-2007, 04:25 PM
| #8 |
| Rock Crawler Join Date: Jan 2006 Location: In the basement
Posts: 929
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Along with the LiPo battery questions I have one. Battery life is rated in mah, so a 2200mah battery would give you the same runtime as a 2200nimh? |
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04-19-2007, 04:41 PM
| #9 | |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Quote:
I am currently testing lipo packs for use in crawlers. The packs that I have used successfully are 2100 2 and 3 cell 15C Enerland packs. Kokam cells are good as well, but I have not tested them in my crawlers. IF you stacked a few of the GWS packs together (like 3 or 4) in parallel you would have a usable battery that is hard to charge. The hardest part of rating a lipo for crawling is the driver. Every style of driving, motor, and location will stress the motors differently. | |
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04-19-2007, 05:02 PM
| #10 |
| Rock Crawler Join Date: Jan 2006 Location: In the basement
Posts: 929
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One last stupid question. I see some cells listed as a 2s2p, does this mean its a 4 cell? |
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04-19-2007, 05:05 PM
| #11 | |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Yes, exactly. 2 Series 2 Parallel. You take two 2 cell packs (7.4v) and hook them in parallel for double the runtime and amperage handling. | |
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04-19-2007, 05:15 PM
| #12 |
| Rock Crawler Join Date: Jan 2006 Location: In the basement
Posts: 929
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So, a mamba maxx wouldn't support something like that? This lipo stuff confuses the crap outta me. |
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04-19-2007, 05:26 PM
| #13 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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The mamba max would only see 7.4 volts nominal, so it would be just fine. The cutoff on the mamba max is key for using lipo too.
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